We propose and demonstrate a novel approach to implement a multi-tap photonic microwave filter. By using a twopump
fiber optical parametric amplifier (OPA), the number of signal laser sources needed is only half of the number of
filter taps because new frequency components idlers are generated. Moreover, the free spectral range (FSR) of the
proposed filter can be changed by simply changing the wavelength spacing between the signals. In our experiment, an 8-
tap photonic microwave filter has been demonstrated using 4 signal laser sources, with FSR tuning range from 1.18 GHz
to 2 GHz which shows consistency between experimental and theoretical results.
KEYWORDS: Signal processing, Eye, Polarization, Dispersion, Signal to noise ratio, Four wave mixing, Switches, Data conversion, Binary data, Nonlinear optics
We have experimentally demonstrated simultaneous 10-Gb/s optical time-slot swapping between return-to-zero (RZ)
signal format and non-return-to-zero (NRZ) signal format based on the parametric wavelength exchange (PWE) in the
highly-nonlinear dispersion shifted fiber (HNL-DSF). Original RZ and NRZ signals located at two different wavelengths
are exchanged after the PWE process. After exchanging between RZ and NRZ signals, the swapping ability involving
two different signal formats within particular time slot has been proved. Clear open eye diagrams of periodic mixed RZ
and NRZ signals are recorded on both wavelengths.
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